Revamped GHA workflow

.github/workflows/test-publish.yml

@@ -0,0 +1,61 @@
+---
+name: Run tests and deploy tag to registry
+
+on:
+  push:
+    branches:
+      - "*"
+    tags: 
+      - "v*.*.*"
+  pull_request:
+    branches:
+      - $default-branch
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  test_and_publish:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log into registry ${{ env.REGISTRY }}
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract Docker metadata
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+    - name: Build Docker image
+      uses: docker/build-push-action@v6
+      with:
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
+        labels: ${{ steps.meta.outputs.labels }}
+        load: true
+        push: false
+        tags: |
+          ${{ steps.meta.outputs.tags }}
+          gha_image
+
+    - name: Run tests
+      run: docker run gha_image /bin/bash -c "cd /usr/local/share/deenurp/;python3 -m deenurp.test;tests/run.sh"
+
+    - name: Push tag to ${{ env.REGISTRY }}
+      if: github.ref_type == 'tag'
+      uses: docker/build-push-action@v6
+      with:
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
+        labels: ${{ steps.meta.outputs.labels }}
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}